1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1278bbc420fe16d531e628cb293ab0d4e118b046d7c1f026e97c8eea14cd0bfd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32c2be2c-6252-4dc2-a495-3efecc37e5e3.json and https://artists.proofprofile.net/proofs/artist/32c2be2c-6252-4dc2-a495-3efecc37e5e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fbfee65c58343b13d4bc9753d2be8f0e612a8d7581248e4ccd969dc39a9277. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWU712004361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e18f720d9f4d66057af180b8210e720a194d684ae5b9f5005dc2e9f389e291d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCG52299830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71429bb4104e82ca49bb2dcc03112eeda154e72812c2511958f30f171e20f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCG52399882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8658b744d8958c1ec4213588db0c6a0e49e567823df8df32afa55242374806. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ842400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c928822518dfbfa778d2bd39dccd2e63fa6b9479ad8ae7ff0ca3a2b20dc8bee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732429668.
小诗句（《大梦归离》影视剧片尾曲） - 人声伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cfbe53f38a5e40fb2cd422c004d34d01357029b60f3629e47817abfddc504. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ842400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7936b74029825f0fc2dac8581eab99e68a4cd051ffccf7f7444ab2a9f6c94f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732429669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219d1c3af66357e6d56ec010106d59d958e425c4b594a5cf07d1931fdda7e983. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWC612051601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035707a2487ff26b6bd899d70391dcef034d1b5bb5fbd5b3a24afa4e461d4a02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWC612051607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b2e0b5214884293be7d39faa7fd0215102246c7c216f329ee89f36536f3ed. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWC612051602.
半我（《大夢歸離》影視劇裴思婧·人物曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d2a55520b3152fd12c72ed7f359136a72dafad72345c731e5c3d5a1f3dfa6f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCT52438325.
半我（《大夢歸離》影視劇裴思婧·人物曲） - 人聲伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712b7d12ebb0226379e0cf5c9b96ef0ffdcd69c0ba71a774ee20398f614ce27e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWCT52438332.
小詩句（《大夢歸離》影視劇片尾曲） - 人聲伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cfbe53f38a5e40fb2cd422c004d34d01357029b60f3629e47817abfddc504. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNZ842400328.